Model : 4099

This high quality timer, from Frederiksen, is particularly suitable for experiments such as 'g' by free fall and speed of sound, as well as other experiments where accurate timing is required. Inputs are via DIN 6 pole connectors (for Frederiksen photocells and microphones) or 4 mm safety sockets (for free fall experiments or other equipment).

• Simple operation - excellent for student experiments
• Time measurements from 0.03 ms to 27 hours
• Measurement precision / resolution 0.01 ms
• 5 digit LED display with floating decimal point
• Manually controlled stopwatch option
• Accepts start and stop signals from microphones, photocells or any on/off switch connected to the 4 mm sockets
• Power: 6 x AA batteries or mains adapter (included)